When systematists compare vertebrates to all other animals, the absence of a vertebral column is the ____ character
state and the presence of a vertebral column is the ____.
a. homologous; homoplasy
b. ancestral; homology
c. homologous; derived
d. derived; ancestral
e. ancestral; derived
ANSWER: e
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Answer the following statement true (T) or false (F)
Which immune system protects the body from its own cancerous cells?
A) cell-mediated immune system B) antibody-mediated immune system C) enzyme immune system D) inflammatory immune system
In fruit flies the gene for vestigial wings will produce tiny underdeveloped wings at room temperature but will produce normal wings at higher temperatures. The vestigial condition in fruit flies is determined by
A. heredity and environment. B. pleiotropy. C. linkage. D. gene imprinting.
Quaternary ammonium compounds are disinfectants effective against
A) endospores. B) mycobacteria. C) nonenveloped viruses. D) Pseudomonas aeruginosa. E) enveloped viruses.